The harbor at Raysut is a natural protected embyament sheltering ships during the summer monsoon. A formal Iron Age/Islamic period fortress commands the heights at the port (as at Mughsayl, Qishn, Muscat etc.). Survey work in the area revealed a substantial series of Iron Age setttlements. 'Raysut' according to Muller may be 'Coseude' on Ptolemy's map.